I use the 4250 predominantly, since I'm not sure how to switch to the other unless it does it automatically. I don't play games so have never had reason to switch.

There is no current updates available at MSI, (the manufacturer website).

Most of their downloads are the original and outdated.

Anyhow I manually updated most of my drivers using the direct manufacturer websites for my Nic, sound card, etc. The problem is with my video drivers.

There is a new version for both of the GPUs listed above, but after installing the first choice, Mobility Radeon HD 4XXX Series, I had a BSOD during reboot. After resolving that and reverting, I installed the 2nd GPU's drivers, Mobility Radeon HD 5XXX Series. It installed without issue and rebooted, but I could tell my screen aspect ratio was off. I checked my Device Manager and it showed the 2nd GPU, the 5470 to be installed correctly, though the 1st, 4250 had a yellow exclamation point.

How do I resolve this? I'm not accustomed to having dual video cards and my understanding has always been that they do not usually work together, so that is why its required to uninstall one or disable the other. In this case they are designed to work together, but how do you update them? Any one else with dual GPUs similar to this?

Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52)

If you would look in the laptop forum where you should have posted this, you would have found your answer. Here, let me read it to you:

Article NumberGPU-28041

The AMD Mobility Radeon™ graphics driver supplied by the notebook manufacturer is customized for the built-in display and the features and functions specific to the notebook. It is recommended to use the drivers provided by the notebook manufacturer.

If installing an operating system other than the one currently supported by the notebook, the notebook may not meet all requirements. As such supported graphics drivers may not be available.

The AMD Mobility Radeon Driver Verification Tool will display the following error if it fails to validate the graphics hardware. This is due to incompatible hardware/configuration in your notebook. Please contact the notebook manufacturer for assistance.

The AMD Mobility Radeon Driver Verification tool helps you determine your notebook’s compatibility with generic AMD Catalyst Mobility drivers. It helps to prevent incorrect installation on incompatible notebooks which may lead to disabled features or functionality.

If you experience difficulty while using the generic AMD Catalyst Mobility drivers, we recommend reverting to the driver provided by your notebook vendor. Please contact your notebook vendor for their most recent graphics drivers.